Gravel Weight per Cubic Metre (kg & Tonnes)
One cubic metre (1m³) of blue metal weighs about 1,500kg, or 1.5 tonnes. Select a gravel type below to calculate your total.
Calculate Your Gravel
Editable presets only — confirm the required depth for your project
Total Volume
What the Gravel Weight Result Means
The page starts with a 1m × 1m area at 1,000mm depth, which is exactly one cubic metre. With blue metal selected, LandscapeCalc multiplies that volume by its 1.50 tonnes-per-cubic-metre planning coefficient to display 1.50 tonnes, or 1,500 kilograms.
Compare the Selected Product, Not Just “Gravel”
Rock type, particle size, fines, moisture and compaction change bulk density. Australian Native Landscapes publishes indicative values including 1.45 tonnes per cubic metre for blue metal, 1.50 for most gravels and 1.55 for river gravel. LandscapeCalc's coefficients range from 1.40 to 1.60; the full list and source policy are on the Methodology & Sources page.
Use Cubic Metres as the Primary Result
Use calculated volume for an initial quote, then ask the supplier to convert that volume for the exact product and delivery condition. The displayed weight must not be used to decide a vehicle or trailer's legal or safe load.
For a different area or depth, use the main gravel calculator. Crusher dust and fine crushed rock are available through the road base calculator.